Ebstein anomaly: 3D virtual and physical models from obstetrical ultrasound data.

3D virtual and physical models from ultrasound scan data allow a 3D spatial view of congenital heart anomalies, interactive discussion among a multidisciplinary team, and improved parental counseling. To the best of our knowledge, this is the first description of 3D physical and virtual models of a fetal Ebstein anomaly.

Is there a role for magnetic resonance imaging in cesarean scar pregnancy after the first trimester?

Magnetic resonance imaging (MRI) can provide additional information in cases of cesarean scar pregnancy beyond the first trimester. MRI and 3D reconstructions can demonstrate the relationships between the uterus, cervix, bladder, and placenta, improving the spatial perspective of the pelvic anatomy in cases requiring surgical management. MRI and 3D reconstructions can also provide more comprehensive images for parental counseling, virtual and face-to-face multidisciplinary team discussion, and medical record storage.

Fetal tetralogy of Fallot: Three-dimensional virtual and physical models from ultrasound scan data findings.

Three-dimensional reconstructions provide a spatial view of the congenital heart disease with a better understanding of the pathology for parents and allow interactive discussion among the medical team (maternal-fetal medicine specialist, neonatology, pediatric cardiology, and cardiovascular surgeon) and improve both objective knowledge and learner satisfaction for medical students.

Placenta acrreta spectrum-first trimester, 2D and 3D ultrasound, and magnetic resonance imaging findings.

BACKGROUND: The term placenta accreta spectrum (PAS) is commonly used to describe abnormal trophoblastic invasion of the myometrium, serosa, or organs adjacent to the uterus. It is of great obstetric importance because of its high morbidity, risk of hemorrhage, admission to the intensive care unit, risk of hysterectomy, and high risk of iatrogenic pelvic lesions and even death. These risks are minimized when prenatal diagnosis is performed. Prenatal diagnosis of PAS is based on imaging findings suggestive of abnormal and pathologically adherent placentation, including placental lacunae (intraplacental sonolucent spaces), disruption of the bladder-uterine serosa interface, turbulent flow on color Doppler, and bridging vessels. OBJECTIVE: In this article, we review the major prenatal imaging features of PAS using diagnostic modalities (first trimester, two-dimensional ultrasound, three-dimensional ultrasound, and magnetic resonance imaging) for the diagnosis of PAS.

Heterotopic twin pregnancy in unicornuate uterus and non-communicating rudimentary horn with survival of both fetuses: Magnetic resonance imaging and 3D reconstructions findings.

We reported a case of heterotopic twin pregnancy in a unicornuate uterus with a non-communicating rudimentary horn with survival of both fetuses. The diagnosis was made late at 28 weeks of gestation, with suspicion raised by ultrasound and confirmed by magnetic resonance imaging (MRI). During hospitalization, obstetric ultrasound with color Doppler was performed every 2 days to assess fetal well-being and myometrial thickness, which was determined by measurements of the uterine wall at the accessory horn. Elective cesarean section was performed at 33 + 5 weeks of gestation. Delivery started with the fetus in the rudimentary horn, with subsequent extraction of the fetus in the unicornate uterus. Three-dimensional virtual reconstruction allowed a spatial view of the both uterus and fetuses with better understanding of the obstetrical condition by the parents and interactive discussion by the multidisciplinary medical team.

Prenatal diagnosis of fetal left ventricular diverticulum: 3D virtual and physical reconstruction models.

Congenital diverticulum is a very rare congenital heart disease. 3D virtual and physical models from ultrasound scan data provide a spatial visualization and better understanding of congenital heart disease to the parents and support possible surgical procedures.

Fetal giant liver hemangioma: Ultrasound, magnetic resonance imaging, three-dimensional reconstruction findings and perinatal outcomes of two cases.

In this case report, we present two cases of fetal liver giant hemangioma assessed using ultrasound, magnetic resonance imaging and three-dimensional reconstructions with their respective postnatal outcomes.

Prenatal diagnosis of closed gastroschisis: What to expect in the most severe form of gastroschisis? Case report and literature review.

Closed gastroschisis (CG) and vanishing gastroschisis (VG) are the most severe forms of evolution of the malformation. In this case, a fetus presented with gastroschisis at 13 weeks, and the gastroschisis was not visualized at 22 weeks of gestation. Distal ileum, cecum, and ascending colon atresia were diagnosed at surgery, and the child is fully enteral-fed at 5 months of age. In a literature review of 43 cases of prenatal diagnosis of CS-VG, intrauterine death occurred in 4.5% of cases. 79.6% of the cases underwent surgical treatment. Of these cases, 20% of cases died due to complications of treatment, 26% were still under treatment and 54% are alive with enteral feeding. In 77% of the cases, the closure of the umbilical ring occurred after 26 weeks of gestation and the absence of prenatal diagnosis of CG-VG during pregnancy has a risk of 71% of death.

Vaginal leiomyoma: Advantages of clinical sonovaginography and ultrasound dynamic evaluation of uterine cervix-related lesions.

Evaluation of vaginal leiomyoma by dynamic transvaginal ultrasound improves the diagnosis, with the impact on surgical planning, and surgical outcomes. Sonovaginography using three-dimensional ultrasound allows the assessment of spatial relationship between the cervix and the tumor.

Prenatal and Postnatal Zika Intrauterine Infection: Diagnostic Imaging Techniques and Placental Pathology.

Introduction: Zika virus (ZIKV) is an arbovirus (arthropod-borne virus) in the genus Flavivirus and Flaviviridae family. In November 2015, several cases of microcephaly in Northeastern of Brazil suggested ZIKV involvement. Case Report: A 33-year-old primigravida developed fever and cutaneous rash at 7th week of gestation (WGA). The ultrasound and MRI examination showed head circumference < 5th centile and enlargement of lateral ventricles. The infant was delivered at 39th WGA with microcephaly. Microscopy of the placenta showed chronic villitis and intervillitis, nodular stromal fibrosis in the stem villi, and vascular thickening. Postnatal CT showed collapsed cranium due to growth impairment of the suprathalamic brain, multiple cerebral calcifications, parenchymal atrophy, and ventricular dilatation. Now, at 6 years old, the child suffers from severe neurologic symptoms, including seizures. Conclusion: This case gathers images of prenatal and postnatal period, and placental histopathology. The long-term follow-up highlights the dramatic neurological sequelae induced by ZIKV.

Placenta accreta: Virtual reality from 3D images of magnetic resonance imaging.

Image from a fragment of the video of virtual reality model evaluating a case of placenta accreta spectrum and placental invasion. In this image, the placenta (purple) goes through the uterus and reaches the bladder muscle and mucosa (pink).

Virtual segmentation of three-dimensional ultrasound images of morphological structures of an ex vivo ectopic pregnancy inside a fallopian tube.

Ex vivo ultrasound (US) of human tissues has been used for decades on the study of the acoustic physical aspects of the US, to the study of the morphology of the organs. Using three-dimensional (3D) US, we demonstrate the possibilities to study surgical specimens from gynecological conditions. 3D images of the surgical specimen were collected and virtually segmented according to the contrast of its images, providing a 3D image of the ectopic pregnancy and its effects on the fallopian tube.

Venolymphatic malformations: prenatal diagnosis using magnetic resonance imaging, perinatal outcomes and long-term follow-up.

BACKGROUND: Venolymphatic malformations are benign. Fetal MRI can more precisely demonstrate an infiltrative pattern of malformations than US. OBJECTIVE: To evaluate perinatal outcomes and long-term follow-up of fetal venolymphatic malformations treated in different medical facilities using fetal MRI. MATERIALS AND METHODS: This retrospective cohort study evaluated 20 pregnant women between 22 weeks and 37 weeks of gestation who were referred from different institutions. They presented with fetuses with various diagnoses of cystic masses on routine US. The cases were studied using MRI. We analyzed prenatal data, perinatal outcomes and long-term follow-up. RESULTS: We reviewed the MRI scans of 20 patients with venolymphatic malformation. Referral diagnosis was changed in 40% (8/20) of cases, with postnatal concordance of 100% (20/20). Moreover, 65% (13/20) presented with venolymphatic malformation in more than one body segment. The neck was affected in 70% (14/20) of fetuses, while the head and thorax were affected in 30% (6/20) and 45% (9/20), respectively. There were intrathoracic lesions in 35% (7/20), lesions in the abdomen in 30% (6/20), and lesions in the perineum and extremities in 10% (2/20) each. Tracheal displacement, neck deflection and anatomical displacement caused by tumoral compression were present in 15% (3/20) of cases. Moreover, 25% (5/20) of newborns required neonatal intensive care unit admission, and all presented with cervical or thoracic venolymphatic malformation. Furthermore, 50% (10/20) of cases presented with complete resolution after medical therapy. The intrathoracic and cervical residuals (35%, 7/20) were monitored and treated. CONCLUSION: MRI showed good correlation with postnatal examination of venolymphatic malformation, was useful in the differential diagnosis of fetal cysts on US, and presented a significant postnatal correlation with thoracic infiltration. The outcomes of prenatally diagnosed venolymphatic malformations are good despite the varying protocols among medical facilities.

Choledochal cyst theories going pear-shaped? Evolution of choledochal cyst during intrauterine life in a case evaluated using magnetic resonance imaging and postnatal outcomes.

A choledochal cyst is a rare abdominal malformation and was first reported almost three centuries before. There are few theories describing the evolution of the cyst through the lifespan of affected patients until diagnosis and prompt treatment; however, there is no image documentation of the evolution of the malformation. In this report, we demonstrate the evolution of a type I choledochal cyst in a fetus from the 24th to the 37th week of gestation using magnetic resonance imaging and perinatal outcomes with correlation with pathophysiological mechanisms.

Pre and postnatal diagnosis of a third branchial cleft cyst by sonography and magnetic resonance imaging with three-dimensional virtual reconstruction.

Branchial cleft cysts (BCCs) are common causes of cervical tumors in children and adulthood; however, prenatal diagnosis of BCC is rare. In neonates, these cysts can suddenly increase in size, causing airway obstruction and becoming a life-threatening condition. In this case report, we describe the prenatal diagnosis of a third BCC at the 25th week of pregnancy using ultrasound, magnetic resonance imaging, and three-dimensional virtual models, as well as the perinatal outcomes of this rare condition.

Congenital Duodenal Stenosis: Prenatal Evaluation by Three-dimensional Ultrasound HDlive Silhouette Mode, Magnetic Resonance Imaging, and Postnatal Outcomes.

The "double bubble" sign is a common sign of congenital duodenal obstruction (CDO), which has been detected during prenatal diagnosis for over 40 years. CDO is strongly associated with chromosomal and structural abnormalities and encompasses a wide spectrum of diagnoses. Here, we describe a case of duodenal stenosis, a rare cause of duodenal obstruction, which was suspected using conventional two-dimensional ultrasound and three-dimensional reconstruction with the HDlive silhouette mode at the 28th prenatal week. The suspicion was further supported by magnetic resonance imaging performed at the 32nd prenatal week and confirmed by postnatal surgery.

The human endosalpinx: anatomical three-dimensional study and reconstruction using confocal microtomography.

PURPOSE: To evaluate in three dimensions (3D) the human endosalpinx and reconstruct its surface along its different anatomical segments, without the injection or insertion of luminal contrasts, using confocal microtomography (micro-CT). MATERIAL AND METHODS: 15 fallopian tubes (FT) from 14 women in reproductive age from procedures for benign disease or sterilization were selected. The specimens were fixed in formalin and stained with Lugol solution. Micro-CT studies were conducted on the specimens using protocols adapted from biological studies, to acquire images to reconstruct in 3D the endosalpinx surface. RESULTS: From these specimens, 6 presented the intra-mural segment, 14 presented the isthmus and 15 presented the ampulla and fimbria segment of the FT. The specimen presented tissue definition, and contrast sufficient for FT endosalpinx morphological analysis and lumen definition. The intramural portion presented initially a mucosal projection toward the lumen, bending on its own axis, and increased numbers of projections towards the isthmic portion, where the projections become longer more numerous. The endosalpinx becomes more tortuous, the lumen diameter increases and the mucosal projections become more bulky in the ampullary portion, with the projections less present on the antimesenteric side. The infundibular portion is marked with the organized and predictable endosalpinx, the abdominal ostium is cleared demonstrated, with the reduction of the endosalpinx volume. The fimbria demonstrated a small relation between fringes and intratubal endosalpinx. CONCLUSIONS: Microscopic anatomy of different segments of the human FT mucosa can be analyzed and reconstructed in 3D with histological correlation using micro-CT.

Prenatal Diagnosis of Caroli Disease Associated With Autosomal Recessive Polycystic Kidney Disease by 3-D Ultrasound and Magnetic Resonance Imaging.

BACKGROUND: Caroli disease is a very rare congenital anomaly characterized by non-obstructive saccular or fusiform dilatation of the intrahepatic bile ducts. It is associated with bile stagnation and hepatolithiasis, which explain the recurrent cholangitis and portal hypertension as a consequence of congenital liver fibrosis. Although there are several reports of diagnosis in childhood and adult life, the prenatal diagnosis using conventional 2-D ultrasound is rare, with few reports in the literature. CASE: We present a case of a 26-year-old primigravid woman at 24 weeks of gestation which 3-D ultrasound in the rendering mode clearly revealed the enlarged fetal kidneys and the increased abdominal volume, confirming the diagnosis of autosomal recessive polycystic kidney disease. The MRI was essential to the prenatal diagnosis of Caroli disease, identifying the congenital saccular dilations of intrahepatic bile ducts.